Loop-sewing machine



Dec. 4 ,1923. 1,476,658

A. L. TRAVER LOOP SEWING MACHINE Original Filed Aug. 28, 1919 4 sheetssheet 1 INVENTOR WITNESSES d1: .Zrm/

4 Sheets-=Shet z IlVl/E/VTOR JQL firmer Dec. 4, 1923. A. L. TRAVER LOOP SEWING MACHINE Original Filed Aug. 28, 1919 & x n v n u aw Wm mm I 1.\ i i S S 1 5255 .6 M :2 T mh z I w um fi um B mm WITNESSES A TTOR/VEYS A. L. TRAVER LOOP SEWING MACHINE Dec. 4 19 23. 1,476,658

orilinal Filed Aug. 28. 1919 4 sheets-sheath WITNESSES IN VE/VTOI? 9 ATTORNEYS Dec. 4, 1923. 1,476,658

A. L. TRAVER LOOP SEWING MACHINE .Origina,1 Filed Aug. 28. 1919 4 She tS-Sheet 4 WITNESSES v 4L IME/W03- 1 E BY afi fid; Y

Patented Dec. 4, 1923.

UNITED STATES 1,476,658 PATENT OFFICE. j

ADELBERT L. TRAVER, F PHILMONT, NEW YORK.

LOOP-SEWING MACHINE.

Application filed August 28, 1919, Serial No. 320,491. Renewed June 8, 1923.

' To all whom it may concern:

Be it known that I, ADELBERT L. TRAVER, a citizen of the United States, anda resident of the city of Philniont, county of Columbia, State of New York, have invented a new and Improved Loop-Sewing Machine, of which the following is a full, clear, and exact description.

This invention relates to sewing machines, and more particularly to loop sewing machines for joining knitted fabrics. The invention directly appertains to a looping machine used in joining knitted cuffs and knitted parts of wearing apparel to other parts of knitted wearing apparel.

* An object of the invention is to provide a' simple and effective looping machine used for the purposes of joining or sewing knit cuffs and armlets, sleeves and the like to the arms and body portions of knit goods or wearing apparel.

It is an object to provide a loop sewing machine upon which may be mounted the knit garment and knit armlet to be fastened or joined tosaid garment.

It is a further object to provide a loop sewing machine provided with a set of thread carrying needles together with a stitch finger, and so arranged as to pass a :0 loop of thread through the garment and through the armlet in order to adequately join the two parts together. It is also a purpose to disclose a machine employing two threads in order to form an over-stitch through the two loops of the knitted fabrics to be joined together; and to provide a loop sewing machine which may be driven at a high rate of speed and be free from skipping stitches.

And it is a further purpose to provide a sewing machine of this character, and for accomplishing the above desired purposes; whichwill be comparatively simple in construction, inexpensive to manufacture, and simple in operation.

With the above principal objects in view and others, the invention has relation to the arrangement and combination of sewing machine parts as set out in the several appended claims, described in the following specification, and portrayed in the accompanying drawings, wherein:

Figure 1 illustrates a plan view of the loop sewing machine.

Figure 2 illustrates elevation. I

the machine in side Figure 3 shows the loop sewing machine in side elevation, a part thereof in section,

and other parts removed. This view presents a different setting or position of the sewing needles from the other views in the drawings.

Figure 4 illustrates a fragmentary plan view enlarged in detail in order to bring out the impaling points and positions assumed bythe sewing needles with reference to the points.

Figureo illustrates still another fragmentary view with a progressed setting or different position of the needles in the cycle of operation of the machine.

The remaining figures of the drawings namely, 6, 7, 8, and 9, illustrate various posi tions in the cycle of operation of the needles.

The different positionsof the needles will more clearly appear as the description continues.

A loop sewing machine built according to V the plans of this. invention employs the usual form of step-by-step rotating imp'aling fringe to hold the garments to be joined together. A stitch finger is mounted on a frame and disposedabove and close to the two parts of knit fabric to be joined together. A pair of cross actuated. thread carrying needles are moved transversely of the stitch finger, one needle above said finger and the other needle ."below said finger to- A shaft 19 is journaled in brackets 20,

said brackets being secured to the underneath side of the circular frame plate 18.Q'

A slotted opening 21 is formed in the frame,

'and a ratchet wheel 22 .is fixed upon the shaft and projects through the opening 21 so as to expose a portion of the ratchet wheel above the frame plate. A pinion 24 is fixed on thejs'haft .19, and meshed with a ring gear 25. The ring gear 25 is rotatably carried on the periphery of the circular frame plate, and driven'step-by-step by the pinion-24 which is rotated by mechanism provided to actuate the ratchet wheel 22 as later seen.

A 27 i mad; a...

frame arm 15. An idle pulley 28 is journaled on the power shaft, and a power pulley 29 is fixed on the shaft. An eccentric cam 30 is fixed to the shaft, and an eccentric strap 31 rotatably carried on the eccentric 30. The eccentric strap 31 has connected thereto a rod 32 which reaches rearwardly and terminates above the ratchet wheel 22. A dog 33 is fixed to the outer end of the rod and engages the ratchet wheel 22. WVlfen the power shaft 27 is driven through a belt applied to the power pulley the eccentric 30 drives the-rod 32 and imparts a step-by-step rotation to the ratchet wheel which rotates the ring gear 25. V

Afringe of impaling points 35 is carried bypthe-ring; gear and disposedra-dia'lly on the-periphery thereof and travels step-bystep-with the'ring gear; This fringe :of impaling points is secured to the ring gear:

in the usual manner, and theimpaling pins aregrooved along'the upper facethereof as shown in the detail views Figures 6 to '9,

as is the usual case with the impaling fringe employ-ed on-machines. of this character; 'A

guard ring 36 is concentrically disposedand' slightly spaced from the ring gears Brackets 37 are secured to the circular frame plate and-preach over- :the impalingifringe :to sup port the guard ring. This ring is employed for the purpose of guiding the impaled fabric throughythe stitching: mechanism as: later i seenand" for the f purpose of "protecting the: delicate points of thewirnpaling fringeex posed-Ito 'view' o1r-the operator s side of ithe.

machine wherethe knit fabricis pushed-upon :therimpaling: fringe: IIlfFig'lllB 1 the impalingfringe L01 impaling points which received thetwo knitted fabrics to be joined together are shown with said fabrics im paled" or" thrust upon the points A loop finger-'39 is adjustably'retained in an arm 40. The" arm. is mounted on 'thecircular frame plate, and is providedxwith versely over the impaling points. A stem 43 is fixedito a bolting bracket-44,

and -ther' bracket is secured to the :frame' 15;.- This disposeszthe stem 43 outwardly from:-

the frametof pivotally mount a bell crank comprising arm 45 and" 46. The'power shaft 27 is ifitted with an eccentric 48, '1and a strap-49 "isjournaledthereon; Thestrap connects" with a link '50, and the link 50'connects with the'bell crank arm 46; The lower bell 'crank arm 45is fitted WithP 'a stitch needle-5'1; As the p'ower s'ha-ft 27 is driven the bell= crank' 45'46 is actuated which causes 'the stitch-gne'edle51 to travel back and forth i'i nderneath the loop finger :39;

A bracket 53 is secured to the frame 15 as an integral -part therewith: The lower crank-arm 46 to the bell {crank 54-55.

The outer adjacent ends of the arms 45 and 54 travel in synchronism--,=-that/is to say; the

outer end of thearm 54'o-scillates in a vertical plane in front of the impaling fringe.-.-

andthe lower end of the arm 45 oscillates in a verticalplane over andapproximately.

parallel to the radially disposed pin of the impalingfringe;

The outer end of the arm 54 pivotally mounts a rocker shaft 59: --lherocker shaft is journaled in the arm-andprojects to eac'h side thereof: and one end is fitted witha looper needle' or hook" 61;,and1onthe otherw' end of the rocker shaftis fixed a rocker arm" 62; A link fillconneots the outer end of then rocker arm 62 with'thea lower end: of the bell;

crank aru'r 45. Eachend of-the link-"63a is from the eccentric 48. This causes "the-loop er'needle 61 to oscillate-:about-theiaxis of its thereof :and? is provided with? the necessary guide *holes for carrying"threadzi bets-are fitted to the machinei :shaft 59 as the rbel'l cranlrarm-54 moves up and-"down. 'r-The ;looper needle" 61-is made with a suitable curvature near thezouter-end;'10

.1 Suitable 'thr'eadiguid'e -n1embers =are pro 1 -vided and: appropriate thread tension *inem Tension" CllSCS=- 70 are. mounted on an-arm '71 and guides the threadi 72 to *the stitch-wneedlea 51. "Likewise: a tension 73 guides thread=74 to the l-oo'per :needle-61.'- o

Inithe useeof this machineyaneoper-ator lmpales the ffabrlc garment 76 and the fabric cuff or slee've' 77 uponthe .impaling-fringe:or impaler-pins This is brought; out-in the several Figures 6 to 9, and shows two pieces of knit fabrics placed on the impaling fringe to be joined-i together by--thread-passed" through: the loops and-knotted= by" the 00-1 operative action of ithe 'severalr needles; The" operator continua-11y places-the knitted -fab= gear: and" fringe continuesi the stepdoy-step knitted :fab-ric revolves stepf-by stepythe ztwo needles 51 and 61 synchronously operate'dueia to :the positive "link connection cforme'dziby the two bell crank IIIGHIbGISP'hJ Thelinkfi? impresses an oscillating'action into the bell crank 54-55, while the lllilkl'fidhe rics upon the inipaling fringeuas the ring rotation. Thelguide 36'bringsthe twoaloopsz"- of thetwo knitted :pie'ces into' proper rela= tionwithtthe needlesfiw- As the 'impaling: fringe together with cits impresses a rotary motion upon the rocker centrically with the axis of the bell crank 4E54E6 underneath lheloop finger 39. The stitch needle therefore, passes its thread 72 underneath the loop finger while'the looper needle passes its thread over the loop finger.

The various positions occupied by the needles during their cycle of operation are shown in the several figures from 6 to 9. In these figures it will be seen that the needle 51 in its forward stroke enters the loop of thread presented by needle 61, and in turn that needle 61 in its up stroke enters the loop of thread sent by needle 51, thus forn'iing the stitch which is the common two-threadover-edge stitch now in common use. In

- Figure 6 it will be seen that the needle 61 is just entering the loop presented by needle 51. the needles gradually move to the position shown in Figure 7 and then to Figure 8. The travel of the needle 61 is in the path of an arc, upwardly and over the loop finger 89 and over the path of travel of the needle 51. As the needle 61 moves back on its return stroke a loop will be presented to needle 51 which immediately enters the loop and then passes beneath the loop finger 39 as indicated in Figure 9. The parts move from this position for the full distance of their traved and then on the return movement assume the position shown in Figure 6. The particular stitch provided is a well known stitch but the way in which the needles 51 and 61 are arranged and the particularway in which they operate together with the mechanism for actuating the same are different from those heretofore provided.

The knitted fabric parts are thus joined together and removed from the impaling fringe after the fabric parts have passed from beyond the range of the guard 36 on the other side of the machine.

This loop sewing machine is presented to fulfill the need felt for a high speed loop sewer useful in the operation of joining knitted fabrics.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A loop sewing machine, comprising in combination; a suitable frame, a ring gear rotatably carried on the frame, impaling fringe radially disposed on the ring gear, a step-by-step driving mechanism adapted to rotate the ring gear and iinpaling fringe, bell crank members pivotedonthe frame, a needle carried by one bell crank, and a rocker shaft carried by the other bell crank, a needle fixed to the rocker shaft, driving mechanism provided to oscillate As the machine continues to operate the bell cranks, and a link associated with therocker shaft and one of the aforesaid bell cranks to oscillate the rocker shaft.

2. A sewing machine, and stitch mechanism, comprising in combination; impaling fringe upon which is threaded knit fabrics to be stitched, a loop finger mounted in a fined position above the impaling fringe, a stitch needle provided to move back and forth under the loop finger, a bell crank pivotally carried on the frame, a rocker shaft journaled in the bell crank, a looper needle fixed to the rocker shaft, a link attached to'the rocker shaft, suitable mechanism employed to move the link to oscillate the rocker shaft to cause the looper needle to move transversely over the loop finger, and suitable driving mechanism employed to operate the parts.

3. A sewing and stitching mechanism, comprising in combination; a frame, a drive shaft journaled in the frame, a bell crank pivoted to the frame, an eccentric to drive the bell crank, a needle carried on the bell crank, and another bell crank pivoted on the frame, a link pivotally joining the two bell cranks in order that the first named bell crank may impart an oscillating motion to the second named bell crank, a rocker shaft journaled in the last named bell crank, a link connected with the rocker shaft and connected with the first named bell crank to impart arocking motion to said rocker shaft, and a looper needle mounted on the rocker shaft to oscillate with the rocker shaft and co-operate with the first named needle to execute stitch operations. 4. A stitching mechanism, comprising in combination; a frame, a pair of hell cranks pivotally mounted thereon, a stitch needle mounted upon one end of a bell crank, and a link mounted upon the other end of this bell crank, another bell crank connected with the link to be oscillated therefrom, a rocker shaft journaled in the second. named bell crank, a rocker arm fixed to the rocker shaft, a link pivotally connected with the rocker arm and pivotally connected with the first named bell crank to oscillate the rocker shaft, and a looper needle mounted on the rocker shaft to oscillate in co-operation with the stitch needle.

5. A stitching mechanism, comprising in combination; a frame, a pair of bell cranks pivotally mounted-thereon, a stitch needle mounted upon one arm of one Ioell crank, and a link mounted upon the other arm of this bell crank, another bell crank connected with the link to be oscillated therefrom, a rocker shaft journaled in the second named bell crank, a rocker arm fixed to the rocker shaft, a link pivotally connected with th rockerarm and pivotally connected with the first named bell crank to oscillate the rocker shaft, and a looper needle mounted onthe rocker shaft to oscil late in cooperation with the stitch needle, and a loop finger:- transversely disposed across and between the stitch needle and l ooper needle.

6. A stitch mechanism for sewing machines-comprising: a pair of bell cranks comprising radial arms said bell cranks pivoted and adapted to be oscillated, a link connection established between two arms of'tlie bell cranks, a needle carried on one bell crank, and a needle carried on the other bell crank, anduineans associated with one bell crank for oscillating the needle carried on the other bell crank.

7. A stitch mechanisn i for sewing ma chines comprising: a pair of bell cranks con- SlStlIlg of radially disposed 1 arms suitably pivoted, a link connection established be-- tweentwo' ofthe radial arms of-the bell cranks, a needle swingably carried on" one" arm of one bell crank, a link associated with said needle and associated with one I of the aforesaid bell cranksto produce oscillation of the needle and a needle carried by the other of said bell cranks.-

suit-ably oscillated a rocker shaft j'otir-naled in one bell crank; a rocker arm fixed to the rocker shaft a connecting link established between the rocker arm and one'of the'bell' crankstooscillate'the'rocker shaft; and a needle mountedon therockers-"shaft, andanother needle carried" on the other bell crank.

ADELBERT L. TRAVER. 1 

